Warble signaling device

Abstract

There are three oscillator circuits which oscillate at different frequencies, each oscillator circuit including a gate having an input and an output. The output of the first gate is connected to an inverter and the input of the second gate. The output of the inverter is connected to the input of the third gate. The output of the second and third gates is connected across a piezoelectric transducer to produce a warble sound.

What is claimed is: 
     
       1. A warble signaling device comprising: a first oscillator means for oscillating at a first frequency, said first oscillator means including a first gate having at least one active input and an output;   a second oscillator means for oscillating at a second frequency different from said first frequency, said second oscillator means including a second gate having at least two active, inputs and an output;   a third oscillator means for oscillating at a third frequency different from said first and second frequencies, said third oscillator means including a third gate having at least two active inputs and an output;   an inverter having an input and an output;   a piezoelectric transducer;   said output of said first gate connected to the input of said inverter and to one input of said second gate;   said output of said inverter connected to one input of said third gate; and   the outputs of said second and third gates connected across said piezoelectric transducer.   
     
     
       2. The warble signaling device of claim 1 wherein said gates are Schmitt trigger gates.